* A transcript of the webcast will be available on this page in the next few days. *

Nkosi Johnson is the 11 year old boy with Aids who captured the heart of South Africa when he gave a powerful and moving speech at the 13th International Aids Conference in Durban last summer.

When Nkosi was three years old, his natural mother, who was dying of Aids, asked Gail Johnson - a white South African - to care for him when she died. Since then, Nkosi has lived with Gail at her home in Johannesburg. But now Nkosi is in the final phase of his illness, lying in a coma at home.

Gail Johnson now campaigns for better support and health care for families suffering from Aids in South Africa. She raises funds for a series of care centres for mothers with children infected with Aids, called Nkosi's Havens.

But some people have accused her of exploiting Nkosi for financial gain.

Gail Johnson took part in a live webcast in which she answered your e-mails, on Monday 21st May at 14.00 BST.